Car truck



lli

Patented Dec., 27,1927.

[TED STATES 11,654,141 PATENT OFFICE.

MARRY M. PFLAGER, OF. ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALT STEEL OMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

t) TRUCK.

hpplication led January My invention relates to railway rolling stock and consists in an improved car truck structure and is particularly adapted for sin wheel trucks in'which the center support or center bolster is carried on cross bolsters which in turn are carried by spaced spring planks. l

@ne object of my invention is to provide a bolster structure in which the cross bolsters may'terminate inside of the equalizer bars, thereby increasing the vertical clearance and permitting use of cross bolsters of desirable bon cross sections and eliminating the use of inverted channel or trough-shaped cross bolsters such as has heretofore been necessary when straight equalizer bars are used. This enables me to reduce the truck wheel base. lt malre possible the use of this type of cro-ss bolster by providing the center bolster with truclr side bearings.

Another objectof my invention is to prom 'vide a bolster of the type referred to, and

equipped with side bearin s, which may be assembled with the truck ame from above and similarly removed. o

@ars are now being built with the truclr and body parts securely fastened together' by means of locked pivot pins in center plates, or otherwise, as it has been found that in cases of collision where one car underframe passes beneath another, the lower underframe will pass between the car body and truck and interlock, thus preventing extension of the telescoping, and one object of my invent-ion is to secure a similar result by so designing truck parts t-hatthe center member when in operating position is inter-locked .with the other truck parts, irrespective of additional elements such as pivot pins, etc., soas to prevent accidental displacement.

y Another object of my invention is to proyide a compact member, comprising the center bolster, side bearings and cross bolsters,l

which in assembling the truck, can be handied and applied as a single unit and will remain in place in the assembled'truck without additional securing means, and will so interlock with other truck parts as to be free for all operating movements, and yet be held against displacement in case of accident.

Another object of my invent-ion is 'to preyent the bolster dropping on to the track in case of failure of swing hangers or other supporting parts. To accomplish this, the parts are so designed that some members of the 10, 1925. serial No. 1,614.'

of a six wheelcar truck including the frame end my improved center member. 1

Figure 2 is in part a side elevation of the structure shown in Figure 1 and in part a longitudinal vertical section through the cen- `ter of the same.

Figure 3 is a transverse vertical section taken substantially on the line 3-3 of Figure l and also showing spring planks and bolster springs. l

The truck illustrated is provided with the usual wheels l, equalizer bars 2, spring planks 3, springs 4, equalizer springs 5, and a frame 6 supported by springs 5 and including wheel pieces 7 transoms 8, and longitudinal bridge members 9`spaced from the wheel pieces and parallel therewith.

Supported on springs 4 are the cross bolsters 1Q preferably made box-shaped in cross sectlon for maximum strength for a'given weight and extending between springs 4, preferably terminating adjacent to their mounting on these springs and inside of the inner faces of equalizers 2 and wheel pieces 7. In the construction shown, the equalizers 2 are of the straight or top type and hence are positioned substantially in the same plane as cross bolsters l0.

The truck center member comprises a center supportv portion 11 with outwardly and downwardly extensions, 12 formed thereon and supported at their outer ends by cross bolsters 10.

Since.- the cross bolsters terminate inside of the truck frame and the usual side bearing arch carried by the ends of cross bolsters is thereby eliminated, I provide side bearings on the center member by means of the outwardly and upwardly extending portions 13 terminating in the side bearings 14.

, Preferably the cross bolsters 10, center bolster 11, arms 12 and extensions 13 of side bearings 14 are all formed in an integral onepiece casting, thereby eliminating the machininfr and handling of separate parts and the bolts or rivets and work required to assemble separate parts. This construction also enables me to produce a bolster member lighter in weight than an assembled structure of the same strength. However, it is not essential for the embodiment of my invention broadly for the parts mentionedto he formed integrally as they may be separately formed and united and applied as a unit to the remainder of the truck structure.

I have also illustrated as a preferred construction of the truck frame a one-piece casting, although this is not essential to my invention.- In the assembled structure, it will be noted that the center member arms 12 pass over the frame inner transoms 8 and the ends of the cross holsters 10 are positioned beneath the bridge members 9. Vith this arrangement the bolster member and the fra-me lare interlocked against vertical displacement as any tendency of the nholster to separate from the frame will he checked by the engagement of the tops of the cross bolsters with the bottom of the members 9. This engagement or interlocking does not prevent the assembly or disassembly of the parts as the center member may be lowered into place by tilting one side so that the ends of the cross holsters may be inserted under their corresponding members 9 and the bolster moved downwardly and laterally until the opposite ends of the cross holsters may drop below the corresponding members y9, after which the center member may be moved laterally to the center of the truck and when in this position and supported by springs 4 undue shifting of the center member transversely of the truck will be prevented by shoulders 15 on the cross holsters and longitudinal displacement by the outer transoms 8.

In my copending Patent No. 1,531,499, I show an integral center and cross holster structure which is adapted to be assembled with the truck frame by being raised into position from below the frame, and in this disclosure the holster arms extend beneath the frame transoms and the cross holsters extend outwardly beneath the wheel pieces of the frame. Obviously, such structure is not adapted for use with straight or top equalizers as is my present structure. However,

Ido not wishlto be understood as .limiting the use of my present structure to a truck in which only the straight equalizers are used. Obviously, the cross holsters may extend beyond the wheel pieces if depressed equalizers are used and if the distance between the tures as allwithin the scope of my invention as expressed in the appended claims.

I claim:

1. In a car truck, an integral frame, and a center member comprising a center bolster and side bearings and cross holsters formed integral, the said member being held by said frame against .displacement in all directions.

2. In a car truck, an integral frame, and a center member comprising a center holster and side bearings on said bolster and cross holsters formed integral, the said member being held by said frame against displacement in all directions.

3. In a car truck, an integral rame,spring planks supported from said frame, springs` carried thereby, and an integral center member comprising a center holster and side bearings and cross holsters mounted on top of said springs, the said member being held by said frame against displacement in all directions.

4. In a car truck, a frame, and a center member comprising a center bolster and side bearings and cross holsters, the said center member being applicable from above to said frame but held thereby against separation therefrom by vertical movement.

5. In a car truck, a frame, and an integral center member comprising a center bolster and side bearings and cross holsters, the said center member being applicable from above to said frame but held thereby against separation therefrom by vertical movement.

6. In a car truck, a frame including wheel I pieces and transoms connecting said wheel pieces, and a center member including a eenter bolster having arms extending over said transoms and having side hearings and cross holsters, said center member being applicable, from above, as a unit, to said frame.

7. In a car truck, a frame including Wheel pieces and transomsI connecting said wheel pieces and transom connecting members, and an integral center member including a cen ter bolster having arms extending over said transoms and having side bearings and cross holsters extending under said members, sam center member being applicable, from above, as a unit, to said frame.

'8. In a car truck, an integral frame, and a center member comprising a center bolster and side bearings and cross holsters and cooperating elements on the said frame and center member, respectively, to limit the movements of said member in all directions.

9. In a'rcar truck, an integral frame, a center member comprising. a center holster with integral side bearings and cross holsters ,and cooperating elementskon the said frame and center member, respectively, to limit the movements -of said member in all directions. A

10. In a car truck, an integral frame, a center member comprising a center holster with side bearings and cross holsters formed integral, and cooperating elements on the lll) retain said trame and center member, respectively, to limit the movements of said member in all directions.

1l. ln a car truck, an integral frame, an integral center member comprising a center bolster and side bearings and cross bolsters,V and cooperating elements on said frame and member, respectively, to limit the vertical movements oli' said member..

l2. ln a car truck, an integral traine, an integral center member comprising a center bolster and side bearings and cross bolsters, and cooperating elements on said :trame and member, respectively, to .limit the horizontal movements of said member.

13. lin a'car truck,- an integral frame, an integral center member comprising a center bolster and side bearings and cross bolsters,

, and cooperating elements integral with said ly therefrom and with cross bolsters extending outwardly from said center bolster beneath said bridges.

16. lln a car truck, an integral rameincluding wheel pieces .and longitudinally extending bridges `spaced inwardly from said wheel, pieces, ay center bolster member 1neluding upwardly and outwardly extending side bearing portions and including cross bolsters extending under said bridges and terminating short of the outer faces ofsaid wheel pieces.

17. ln a car truck, an integral frame 1neludiiig wheel -pieces and longitudinally extending bridges spaced inwardly from said wheel pieces, a center bolster member -including upwardly and outwardly extending side bearing portions and including cross bolsters extending under said bridges and terminating short of the outer faces of said wheel pieces, and portions o-n said cross bolsters adapted to engage the sides of respec=,

tive bridges to limit movement of said inember transversely of the truck.

i8. lin a car truck, a one-piece frame `including wheel pieces, equalizer bars beneath said wheel pieces, cross bolsters terminating short of said equalizer bars and lying in substantially the same horizontal plane as said equalizer bars, a Icenter lbolster carried Yby Said cross bolsters, and side bearings carried cluding wheel by said center bolster, said cross bolsters, center bolster and side bearings being a plicable and removable as a unit toand From the remainder of the truck strcture.

19.7In a car truclna one-piece traine including Wheel pieces, equalizer bars beneath said Wheel pieces, cross `holsters terminating short of said equalizer bars and lying in substantially the same horizontal plane a said equalizer bars, a center bolster carrie by said cross bolsters, and side bearings carried by saidrcenter bolster, said cross bolsters, center bolster and side bearings being formed as parts of a one-piece casting.

20. In a car truck, a one-piece frame incliiding wheel pieces, equalizer bars beneath said wheel pieces, cross bolsters terminating short of said equalizer bars, a center bolster carried by said cross bolsters, and side bearings carried by said center bolster, said cross bolsters, center bolster and side bearings being applicable and removable as a unit to and from the remainder ol the truck structure.

v21. ln a car truck, a one-piece frame including wheel pieces, equalizer bars beneath said wheel pieces, cross bolsters terminating short of said equalizer bars, a center bolster carriedl by said cross bolsters, and side bearings carried by said center bolster, said cross bolsters, center bolster and side bearings be-l ing formed as parts of a one-piece casting.

22. In a car truck, a trame including wheel pieces, transoms connecting said Wheel pieces, and bridges parallel with and inside said wheel pieces, and a bolster member including a center support, arms thereon extending over said transoms, side, bearings, and cross holsters extending under said bridges, said member bein applicable to said frame as a unit from a ove.

23. In a car truck, an integral frame inpieces and` longitudinal bridges spaced inwardly therefrom and transverse transoms, and a unit bolster structure including transverse elements which extend beneath said bridges, but not beneath said Wheel pieces, and also including longitudinal elements which extend above said transoms. f

24,. In a car truck, an integral frame including wheel pieces and parallellongitudinal bridges spaced inwardly therefrom and transverse transoms, and a one-piece cast center bolster positioned between said wheel pieces and some of saidL transoms and in cluding longitudinal elements which extend over other of said transoms and including transverse elements lwhich extend beneath said bridges but terminate short of said wheel pieces. y

25. In a car truck, an integral truck frame, spring planks supported :from said frame, springs carried by said spr'ing planks, and an integral center member comprising a center bolster and cross holsters and side bearings carried by said center bolster inde- `pendently of said cross holsters, said cross holsters being mounted on` top of said springs, said center member being held by said frame against displacement in all directions.

c 26. In a car truck, a frame, and a center member comprising a center bolster and cross holsters and side hearings carried'- by said center bolster independently of said cross holsters, said center member being applicable from above to said frame but held thereby against separation therefrom by vertical movement.

27. In a car truck, a frame, and an integral center member comprising a center ho ster and cross holsters and side bearings carried by said center bolster independently of said cross holsters, said center member heino applicable from ahove to said frame but Iield thereby against separation therefrom by vertical movement.

In testimony whereof I hereunto aflix my signature this 27 day of December, 1924. H. M. PFLA'GER. 

